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4 Sheets-Sheet 1.

(No Model.)

0. KLATTE. ROLLS FOR THE MANUFACTURE OF CHAINS.

No. 523,432. 2 Patented July 24, 1894.

(No Model.) 4 $heets-Sheet O. KLATTE. ROLLS FOR THE MANUFACTURE OF CHAINS. N0. 523,432. Patented July 24,1894.

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No. 523,432. Patented July 24, 1894.

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(No Model.) 4 Sheets-Sheet 4. 0. KLATTE. ROLLS FOR THE MANUFACTURE OF CHAINS.

Patented July 24, 1894.

M2 ea'seut- UNITED STATES PATENT 1 OFFICE.

OTTO KLATTE, OF NEUWIED, GERMANY.

ROLLS FOR THE, MANUFACTURE QOF'CHAINS.

SPECIFICATION forming partof Letters Patent No. 523,432 dated July 24, 1894.

APPlicetion filed March 8.1892. Serial No. 424,127., (No model.) Patented in Germany December 18,1891,No.65,548; in

France January 12, 1892, No. 218,628; in Luxembnrg January 14, 1892, No. 1,550; in England January 23, 1892, 1 111 5mm January 27, 1892, No. 98,110; in Italy March 31, 1892, LXI, 215, and in Austria-Hungary September 28, 1892,1lo. 24,464 and No. 71,756..

To wZZ whom it may concern:

Be it known that I, OTTO KLATTE, a subect of the German Emperor, and a resident of Neuwled-on-the-Rhine, Germany, have invented certain Improvements in-Mechanism for the Manufacture of Chains from Bars having a Oruciform Section, (or which patents have been granted to me in Great Britain, No. 1,413, dated January 23, 1892; in Germany, No. 65,548, dated December 18, 1891; in France, No. 218,628, dated January 12,- 1892; in Luxemburg, No. 1,550, dated January 14, 1892; 1n Belgium,'No. 98,110, dated January 27, 1892; in Italy, LXI, 215, dated March 31, 1892, and in Austria-Hungary, No. 24,464 and No. 71,756, dated September 28, 1892,) of which the following is a specification.

My invention relates to mechanism for maklng chains according to the mode embodying the three following operations:

First. A bar, of a cross-shaped transverse section when heated, is passed through rolls, the grooves of which are formed of four rolls arranged in pairs and provided with projections in such a manner that the depressions required for the formation of the links are produced thereby in the rod, and that each link has imparted to it an internal and external quadrilateral form. The rod is passed through the rolls with its wings or ribs diagonal to the axes of the rolls. I

while at a dull red heat. To be able to do this,-

it is absolutely necessary that by rolling the links should receive on the inner sides the form of arectangle with rounded corners. After shearing, the several links have imparted to them the desired rounded form by pressing or by hand-forgin In the accompanying drawings I have'shown same scale as Fig. 3, of a part of the edge of the roll d, seen in plan. Fig. 5 is aside view of same, and Fig. 6 is a diametrical section through one of the rolls. Figs. 7, 7 8, 8 9, 9, 10, 10, 11, 11, 12 and 12, are detach-ed, fragmentary views which will be hereinafter explained, showing the form of the teeth on the disks which compose the rolls. Figs. 13,

14 and 15 are views illustrating the forma tion of the chain-links; and Figs. 16, 17, 18 and 19 are views illustrating the mode and means employed for separating the connected links and rounding them. Figs. 20 and 21 show cross-sections of such bars as may be used in the making of chains with my machine.

The machine or mill seen in Figs. .1 and 2 serves to carry out the first operation above described. It consists of four rolls 0., b, c and d, of equal diameter and arranged in pairs, one pair of rolls being placed at right-angles to the other. The axes of the journals of all four rolls lie in the same plane and all the rolls have the same speed. The journal or shaft, 6, of the lower roll (1, is coupled to and driven from the main shaft, f; and the journal of the roll I), is driven from the main shaft through the medium of gear wheels g, h, ina well known way. The rolls aand c are driven from the roll I) (as herein shown) through the medium of miter gear wheels 70, on the roll b, and the rolls a and 0, respectively, as clearly seen in Fig. l. The rolls are mounted in a frame A, on a bed-plate B. I

I will now describe the construction of the rolls with especial reference to Figs. 3, 4, 5 and 6. Each roll is made up of disks clamped together face to face; Fig. 6 shows the construction; these disks are designated by reference-numerals in the detail views. 1, 2, 3,

4 ration of the links at the points 0 is effected 4, 5 and 6 are the link-forming disks of the roll; 7, 7, are two clamping disks which embrace the link forming disks, and 8, 8, are outer, reinforcing disks to impart strength. The link-forming disks all have projecting parts or teeth in their peripheries so formed and arranged as to shape or mold the links as the bar passes through the rolls.

In Figs. 7,':8, 9, 10,11 and 12,1have shown, in side elevation, fragments of the six formmg disks comprised in the lower roll d; Fig. 7 represents disk 6, Fig. 8 represents disk 5, F g. 9, disk 4, and so on from right to left in Fig. 4. Figs. 7 8, 9, &c., are cross-sections of the respective disks 7, 8, 9, &c. The proections on the disks 1, 2 and 3, and those on the respective corresponding disks 4, 5 and ii, are positives and negatives, or reflected lmages of each other. That is, if the disk 3 were held before a mirror its image would give the form for the disk 4, and the same may be said of disks 2'and 5, and 1 and 6. This will be seen by inspection of Figs. 4, 7, 8, 9, 10, 11 and 12. Furthermore, the three disks 1,2 and 3 are placed with respect to the other three, 4, 5 and 6, as clearly shown in Fig. 4.

The projections on the forming disks are so shaped that, in the position of the rolls represented in Fig. 3, those lying in the diagonal line from a: to w in Fig. 3 will produce the depressions in the ribs of the bar between the links, designated by 71, in Figs. 13 and 14, and those projections which lie in the other diagonal line, y, y, will produce in the other ribs of the bar the apertures in the links designated by Z, in Figs. 13 and 14. I may say here that Fig. 14 is a cross-section of the bar from which the chain is formed taken in the same plane as the rolls in Fig. 3.

As the four rolls a, b, c and d continue to rotate and the bar is carried along, the ribs on the diagonal line 03,00, will nexthave holes Z formed in them and those on the diagonal line 3 'y, will have depressions formed in them. Thus the rolls alternate in their action as each succeeding link is formed, so that, when the bar shall have passed through the rolls, it will present the appearance seen in Fig. 13, substantially. There will usually be a burr or fin, indicated by dotted lines at m, in Fig. 14, and this is driven out by a punch, or by toothed rolls. The bar (secnin Fig. 13) from the rolls will now have its links connected by ties at the several points 1'; this tie is designated by n in Fig. 14. These ties are punched out by a punch; and after this is done thelinks will remain still connected throughout the whole thickness of the metal, only at the points marked 0, in Figs. 15 and 17. The punch used for driving out the tie n may have the form seen in Fig. 16, if desired; this will give to the metal of the link the rounded form seen in Fig. 17. The sepaby shearing the metal at these points; and to effect this, without the removal of any metal a link is driven laterally or sidewise with respect to the adjacent links to which it is coupled, as clearly shown in Fig. 17. This is effected by the device illustrated inFigs. 17, 1S and 19, of which Fig. 17 is a side view,

- Fig. 18 a plan, and Fig. 19 a section on line 7", s, in Fig. 17. A forked, flat bar, g, has its branches passed through the adjacent links and arranged to rest on the ends'of the link to be sheared off. A punch 19, forked so as to straddle the two adjacent links, is then placed on the plate q and driven down by a blow. The shearing off and final separation of the links is efiected after the quadrangular inner form of the links has been transformed from the shape seen in Fig. 15 to that seen in Fig. 17, and this may be done by filing, forging, or any other means.

The actionof the forked punch or stamp is fully illustrated in Figs. 17, 18 and 19. In Fig. 17, the horizontal link to the right is shown as forced down and sheared 011, while in Fig. 19 the stamp is represented as placed in position ready for operation. To insure the complete separation of the link at 0 it is recommended to repeat the operation, turning the chain over and driving the link also in the opposite direction.

After separation, the links will be pressed or hand-forged in order to give them the proper rounded form.

The cruciform bar from which the chain is to be formed may have either the cross-section seen in Fig. 20, or that seen in Fig. 21. The latter is the more advantageous because the depressions formed in the ribs or wings in rolling it lessen the amount of metal to be displaced and facilitate the formation of the chain with the rolls seen in Fig. 3.

Chains with bridges in the links may be formed by the method above described, it being only necessary to modify the forms of the projections or teeth onthe forming disks of the rolls.

I am aware that it is not new, broadly, to form a weldless chain from a cruciform bar, or at least that such a mode of manufacture has been proposed and this I do not claim. I am convinced, however, from my experience in this manufacture, that the methods 'lIO heretofore proposed, of which I have knowledge will not produce chains of good quality nor can these methods be worked cconomically.

Having thus described my invention, I claim-- 1. A machine for use in the manufacture of weldless link chains from cruciform bars, comprising four die-rolls, each composed of six toothed disks clamped together abreast, the teeth of the disks 1, 2 and 3 being negatives of those on the disks 4, 5 and 6 and dis placed, with respect to those on the latter disks, as set forth.

2. A machine for use in the manufacture of chains with solid links from cruciform bars, comprising four dierolls, a, b, c and d, each composed of toothed die-disks, 1, 2, 3, 4, 5 and 6, clamping disks 7 and 8, and means for se- In testimony whereof I have signed my curing all of the disks firmly together, the name to this specification in the presence of to teeth or forming dies on the disks 1, 2 and 3, two subscribing witnesses.

being negatives of those on the disks 4', 5 and 1 6, and displaced, with respect to those on the OTTO KLATI latter disks to the extent of one-half the length Witnesses: v

of a link of the chain to be rolled, substan- SIBILLA LANG,

tially as set forth. H. ALLEN MAXWELL. 

